Maxim Integrated MAX824REXK Microprocessor Supervisor

The Maxim Integrated MAX824REXK is a compact, highly efficient microprocessor (µP) supervisory circuit designed to monitor power supplies in µP and digital systems. It provides excellent circuit reliability and low-cost solution by offering features such as power-on reset control, watchdog timer, and manual reset capability.

Key Features

• Power-On Reset (POR) Control: The MAX824REXK ensures that the µP is held in reset for a minimum of 140ms after power becomes valid, providing the system enough time to stabilize before the processor starts.
• Watchdog Timer: A watchdog timer is integrated to prevent system failures due to software lock-up. This feature requires periodic servicing by the host software to avoid system reset, thus ensuring proper system operation.
• Manual Reset Input: A manual reset input allows for an external override, enabling system designers to initiate a system reset remotely or through user interaction.
• Low Power Consumption: This device is designed for power-sensitive applications, consuming minimal power to preserve battery life in portable devices.
• High Accuracy: The reset threshold voltage is highly precise, ensuring reliable reset activation appropriate for the connected µP or digital system.
• Compact SOT23-5 Package: The small footprint of the SOT23-5 package makes it ideal for space-constrained applications, without compromising on performance.

Applications

The MAX824REXK is versatile and can be used in a variety of applications where reliable system monitoring is critical. It is particularly suitable for portable/battery-powered devices, computers, controllers, intelligent instruments, and critical µP power monitoring scenarios.

Technical Specifications

• Supply Voltage Range: 1.2V to 5.5V
• Reset Threshold Voltage Options: Factory preset
• Reset Timeout: 140ms min
• Watchdog Timeout: 1.6s min
• Operating Temperature Range: -40°C to +125°C
• Package Type: SOT23-5

Overall, the Maxim Integrated MAX824REXK is a highly reliable and essential component for any system requiring robust power monitoring and reset functionalities, ensuring that digital systems operate smoothly and without interruption.